/// <summary>
/// This handles the save operation for this page
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public virtual void SaveOperation(object sender, RoutedEventArgs e)
{
string user = WebContext.Current.User.DisplayName;
if (Grid.IsValid)
{
//commit any unsaved changes to avoid an exception
if (Grid.CommitEdit())
{
//capture all the changes and their reasons
var modification = DomainSource.DomainContext.EntityContainer.GetChanges();
#region Change tracking for modified entries
foreach (var modified in modification.ModifiedEntities)
{
//var original = modified.GetOriginal();
object original;
Grid.OriginalEntities.TryGetValue((int)modified.GetIdentity(), out original);
//also try in this page level modified entries
if(original == null && OriginalEntities != null)
{
object pagelevelOriginal;
this.OriginalEntities.TryGetValue((int)modified.GetIdentity(), out pagelevelOriginal);
//this is assuming that page level there will be only one entity type at max. This is a reasonable
//assumption for this application
if (pagelevelOriginal != null)
{
if (pagelevelOriginal.GetType() == modified.GetType())
{
original = pagelevelOriginal;
}
}
}
if (original != null)
{
Type type = modified.GetType();
PropertyInfo changeContextProp = null;
if (ChangeContextValue == null)
{
changeContextProp = type.GetProperty(ChangeContextProperty);
}
//check if change context value is set, else take it from the change context property name defined
var propertyValue = this.ChangeContextValue ??
changeContextProp.GetValue(modified, null);
string changeContextString = String.Concat(ChangeContext, "-",
(propertyValue ?? "").ToString());
List<Change> changes = Utility.GetChanges(original, modified, changeContextString,
user, ExcludePropertiesFromTracking);
changes.ForEach(p => allChanges.Add(p));
}
}
#endregion
#region change tracking for deleted entries
foreach (var deleted in modification.RemovedEntities)
{
Type type = deleted.GetType();
PropertyInfo changeContextProp = null;
if(ChangeContextProperty != null)
changeContextProp= type.GetProperty(ChangeContextProperty);
var propertyValue = this.ChangeContextValue ?? changeContextProp.GetValue(deleted, null);
string changeContextString = String.Concat(ChangeContext, "-",
(propertyValue ?? "").ToString());
Change change = new Change()
{
When = DateTime.Now,
Where = changeContextString,
FromValue = "",
ToValue= "Deleted",
ByWhom = user,
Why = " "
};
allChanges.Add(change);
}
#endregion
#region change tracking for added entries
//for added entities, whether changes will be tracked or not is determined by the page level
//hence keeping this there
if (ConsiderAdditions)
{
foreach (var modified in modification.AddedEntities)
{
Type type = modified.GetType();
//do not track addition of changes themselves, which are entities
if (type == typeof(Change))
continue;
PropertyInfo changeContextProp = type.GetProperty(ChangeContextProperty ?? "");
if (changeContextProp == null)
continue;
var propertyValue = changeContextProp.GetValue(modified, null);
string changeContextString = String.Concat(ChangeContext, "-",
(propertyValue ?? "").ToString());
allChanges.Add(new Change()
{
When = DateTime.Now,
Where = changeContextString,
FromValue = "",
ToValue = "Added",
ByWhom = user,
Why = " "
});
}
}
#endregion
if (allChanges.Count != 0)
{
//get reason for all the changes - do not let user submit without all reasons
ChangeReasons cr = new ChangeReasons();
cr.Changes = allChanges;
cr.Closed += new EventHandler(cr_Closed);
cr.Show();
}
else
{
//if no changes worth tracking but still there are changes
SaveChanges();
}
}
}
}
/// <summary>
/// This handles the save operation for this page
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
public virtual void SaveOperation(object sender, RoutedEventArgs e)
{
string user = WebContext.Current.User.DisplayName;
if (Grid.IsValid)
{
//commit any unsaved changes to avoid an exception
if (Grid.CommitEdit())
{
//capture all the changes and their reasons
var modification = DomainSource.DomainContext.EntityContainer.GetChanges();
#region Change tracking for modified entries
foreach (var modified in modification.ModifiedEntities)
{
//var original = modified.GetOriginal();
object original;
Grid.OriginalEntities.TryGetValue((int)modified.GetIdentity(), out original);
//also try in this page level modified entries
if (original == null && OriginalEntities != null)
{
object pagelevelOriginal;
this.OriginalEntities.TryGetValue((int)modified.GetIdentity(), out pagelevelOriginal);
//this is assuming that page level there will be only one entity type at max. This is a reasonable
//assumption for this application
if (pagelevelOriginal != null)
{
if (pagelevelOriginal.GetType() == modified.GetType())
{
original = pagelevelOriginal;
}
}
}
if (original != null)
{
Type type = modified.GetType();
PropertyInfo changeContextProp = null;
if (ChangeContextValue == null)
{
changeContextProp = type.GetProperty(ChangeContextProperty);
}
//check if change context value is set, else take it from the change context property name defined
var propertyValue = this.ChangeContextValue ??
changeContextProp.GetValue(modified, null);
string changeContextString = String.Concat(ChangeContext, "-",
(propertyValue ?? "").ToString());
List <Change> changes = Utility.GetChanges(original, modified, changeContextString,
user, ExcludePropertiesFromTracking);
changes.ForEach(p => allChanges.Add(p));
}
}
#endregion
#region change tracking for deleted entries
foreach (var deleted in modification.RemovedEntities)
{
Type type = deleted.GetType();
PropertyInfo changeContextProp = null;
if (ChangeContextProperty != null)
{
changeContextProp = type.GetProperty(ChangeContextProperty);
}
var propertyValue = this.ChangeContextValue ?? changeContextProp.GetValue(deleted, null);
string changeContextString = String.Concat(ChangeContext, "-",
(propertyValue ?? "").ToString());
Change change = new Change()
{
When = DateTime.Now,
Where = changeContextString,
FromValue = "",
ToValue = "Deleted",
ByWhom = user,
Why = " "
};
allChanges.Add(change);
}
#endregion
#region change tracking for added entries
//for added entities, whether changes will be tracked or not is determined by the page level
//hence keeping this there
if (ConsiderAdditions)
{
foreach (var modified in modification.AddedEntities)
{
Type type = modified.GetType();
//do not track addition of changes themselves, which are entities
if (type == typeof(Change))
{
continue;
}
PropertyInfo changeContextProp = type.GetProperty(ChangeContextProperty ?? "");
if (changeContextProp == null)
{
continue;
}
var propertyValue = changeContextProp.GetValue(modified, null);
string changeContextString = String.Concat(ChangeContext, "-",
(propertyValue ?? "").ToString());
allChanges.Add(new Change()
{
When = DateTime.Now,
Where = changeContextString,
FromValue = "",
ToValue = "Added",
ByWhom = user,
Why = " "
});
}
}
#endregion
if (allChanges.Count != 0)
{
//get reason for all the changes - do not let user submit without all reasons
ChangeReasons cr = new ChangeReasons();
cr.Changes = allChanges;
cr.Closed += new EventHandler(cr_Closed);
cr.Show();
}
else
{
//if no changes worth tracking but still there are changes
SaveChanges();
}
}
}
}
